linux-kernel - [RFC PATCH v2 5/6] virtio/vsock: remove record size limit for SEQPACKET

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Message-ID: <20210704081055.89685-1-arseny.krasnov@kaspersky.com>
Date:   Sun, 4 Jul 2021 11:10:52 +0300
From:   Arseny Krasnov <arseny.krasnov@...persky.com>
To:     Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Arseny Krasnov <arseny.krasnov@...persky.com>,
        Jorgen Hansen <jhansen@...are.com>,
        Colin Ian King <colin.king@...onical.com>,
        Norbert Slusarek <nslusarek@....net>,
        Andra Paraschiv <andraprs@...zon.com>
CC:     <kvm@...r.kernel.org>, <virtualization@...ts.linux-foundation.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <oxffffaa@...il.com>
Subject: [RFC PATCH v2 5/6] virtio/vsock: remove record size limit for SEQPACKET

Remove record size limit which was 'peer_buf_alloc' value.
New approach doesn't need this, because data is copied to
user's buffer in stream manner(we don't wait until whole
record is received).

Signed-off-by: Arseny Krasnov <arseny.krasnov@...persky.com>
---
 net/vmw_vsock/virtio_transport_common.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index 52765754edcd..5cfdf701a8af 100644
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -507,17 +507,6 @@ virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk,
 				   struct msghdr *msg,
 				   size_t len)
 {
-	struct virtio_vsock_sock *vvs = vsk->trans;
-
-	spin_lock_bh(&vvs->tx_lock);
-
-	if (len > vvs->peer_buf_alloc) {
-		spin_unlock_bh(&vvs->tx_lock);
-		return -EMSGSIZE;
-	}
-
-	spin_unlock_bh(&vvs->tx_lock);
-
 	return virtio_transport_stream_enqueue(vsk, msg, len);
 }
 EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_enqueue);
-- 
2.25.1